Saturday, September 27, 2025

autonomic nervous system

 sympathetic nervous system and parasympathetic nervous system

1 comment:

  1. Neuromuscular system
    CNS consists of brain and spinal cord
    PNS connect the rest of the body
    afferent neuron are sensory neuron
    efferent neuron are motor neuron
    efferent neuron carry impulse away from the CNS
    afferent neuron carry impulses towards to the CNS
    somatic nervous system is the division of
    sympathetic nervous system - fight and flight response
    parasympathetic nervous system- rest and digest response
    neuron
    axon
    axon is an extension of neuron
    dendrite - receive chemical information
    myelin sheath- fatty cover of axon -
    synapse -junction between the axon and
    synptic gap
    acetycholine -most important neurotransmitter
    neuromuscular junction - join together sarcomere unit
    muscle can be voluntary muscle under conscious control example skeletal muscle
    involuntary muscle - control heart beat , smooth muscle of the digestic system , intestine
    respiratory system -
    function of the unit of the different body function
    muscle contraction
    actin and myosin
    generally apply concept

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